a poorly woven textile, or something loose, something poorly tied (see Molina)
IPAspelling:
kɑkɑʃɑlli
Alonso de Molina:
cacaxalli. cosa mal atada y floxa, o mal apretada. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 10v. col. 2. Thanks to Joe Campbell for providing the transcription.